The City will be marking a milestone at this year's annual Arbor Day celebration. The free event will be held on Friday, March 22 at 11 a.m. in the newly landscaped Black Wall Street Plaza in downtown. As part of the day's events, Durham will be recognized as a "Tree City USA" for the 30th consecutive year. Attendees will also be able to receive a free tree seedling. Photos of the newly planted tree can be redeemed for discounts at sponsoring businesses.